Bug 87475 - Value of HZ has changed?
Summary: Value of HZ has changed?
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 8.0
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2003-03-27 13:49 UTC by Justin Skists
Modified: 2007-04-18 16:52 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2003-03-27 14:05:29 UTC

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Description Justin Skists 2003-03-27 13:49:36 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0)

Description of problem:
I beleive the same problem occurs with kernel-source-2.4.18-27.8.0, aswell.

Compiling my company's driver against the redhat kernel (as opposed to the 
kernel 2.4.18) caused a subtle behavour change in the driver.

I have tracked the problem down to the kernel define "HZ" being set to '512' as 
opposed to being '100' as in the kernel.org kernel.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. create minimal driver to prink out value of HZ
2. compile and load driver for stock redhat 8 kernel
3. compile and load driver for kernel.org 2.4.18 kernel
4. compare results

Actual Results:  the kernel define "HZ" being set to '512'....

Expected Results:  ...as opposed to being '100' as in the kernel.org kernel.

Additional info:

I'm not sure if this is a bug or intentional.

Comment 1 Arjan van de Ven 2003-03-27 14:05:29 UTC
this is fully intentional; it helps interactive performance

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